Micro-structure in the Joint Friction Plane in Friction Welding of Dissimilar Steels

Microstructure in the joining zone during the friction welding of the two dissimilar steels

“…The obtained results have shown that axial shortening exponentially increased with increased friction pressure while the influence of the welding time on hardness and strength is different, and the optimal parameters for high hardness values are 125 MPa of friction pressure, 180 MPa of forge pressure and 3 s of friction time; for high ultimate strength parameters, the values are 150 MPa of friction pressure, 220 MPa of forge pressure and 5 s of friction time. Similar research was also conducted by Ratković et al (2009a, 2009b, 2016b), in which some analyses were conducted, which were related to structural and chemical changes in the joint, as well as to the influence of the welding parameters on the joint deformation – shortening and joint diameter. These results have shown that one of the most important parameters is the welding time and that by its extension, the deformation of joints is increasing.…”

“…Friction welding has numerous advantages from the aspect of environmental and human resources protection, as emphasized by Veljić et al (2015), and it creates the joints of very good mechanical properties (as shown in Ratković et al , 2014; Sahin, 2005; Handa and Chawla, 2013; Ratković et al , 2016b, 2009a, 2009b, 2016a; Savić et al , 2008; Ma et al , 2015; Liang et al , 2015). The authors of those papers were dealing with problems of strength of the friction welded joints, as well as with the influence of certain welding parameters on the output mechanical characteristics of the joint.…”

“…The authors of those papers were dealing with problems of strength of the friction welded joints, as well as with the influence of certain welding parameters on the output mechanical characteristics of the joint. Ratković et al (2014) were considering structural, chemical and deformation changes appearing in different zones of the friction welded joint, while Sahin (2005) presented an original experimental setup produced to achieve the friction welding of components having equal diameter and compared the obtained results with those from literature. When the subject matter is the analysis of mechanical characteristics of the executed welded joints, a detailed study was presented by Handa and Chawla (2013), which has included the friction welding process parameter optimization, microstructure and mechanical properties characterization and fracture behavior.…”

“…For instance, in papers by Ratković et al (2009a, 2009b), the tensile strength of friction welded joints is increasing with an extension of the welding time. However, despite those benefits, the increased welding time could also lead to the presence of carbides in the zones of dynamic recrystallization, what also has to be kept in mind (Ratković et al , 2016b). In addition, in papers by Savić et al (2008) and Ma et al (2015), the joining of the high-speed steel HS 6-5-2-5 and carbon steel C60 was analyzed, where an attempt was made to create a model for the friction welding of dissimilar materials, by monitoring the temperature cycles and variation of the microstructure during the welding process.…”

Preliminary Study on Effect of Rod Geometry in FHPP Between Fe55006 Nodular Cast Iron and Sae 8620 Stell

“…Os estudos de Choi, Liu e Fujii, 2018, apresentaram chapas de titânio e alumínio unidas pelo processo Friction Stir Welding (FSW), e os autores obtiveram como resultados juntas com resistência a tração próximo de 100 MPa. Soldas dissimilares entre ligas de aços de médio e alto carbono também já foram estudadas e tiveram sua microestrutura final relacionada com os parâmetros utilizados (Ratković et al, 2016). Sahin (2005) soldou barras de 10 mm de diâmetro de aço rápido (HSS-S 6-5-2) e aço médio carbono (AISI 1040) pelo processo de soldagem por fricção e conseguiu juntas com com pripriedade mecânicas similares a dos metais base.…”